diff --git a/frontend/src/components/QueryEditor.external-sql-save.test.tsx b/frontend/src/components/QueryEditor.external-sql-save.test.tsx
index 7eb84e8..3ad5db5 100644
--- a/frontend/src/components/QueryEditor.external-sql-save.test.tsx
+++ b/frontend/src/components/QueryEditor.external-sql-save.test.tsx
@@ -741,6 +741,15 @@ describe('QueryEditor external SQL save', () => {
     });
     expect(textContent(renderer.toJSON())).not.toContain('等待执行 SQL');
 
+    const FakeNode = class {};
+    const bodyNode = new FakeNode();
+    const documentElement = new FakeNode();
+    vi.stubGlobal('Node', FakeNode);
+    vi.stubGlobal('document', {
+      body: bodyNode,
+      documentElement,
+    });
+    editorState.hasTextFocus = false;
     const isMacRuntime = /(Mac|iPhone|iPad|iPod)/i.test(`${navigator.platform || ''} ${navigator.userAgent || ''}`);
     const toggleEvent = {
       ctrlKey: !isMacRuntime,
@@ -748,7 +757,7 @@ describe('QueryEditor external SQL save', () => {
       altKey: false,
       shiftKey: true,
       key: 'm',
-      target: null,
+      target: bodyNode,
       preventDefault: vi.fn(),
       stopPropagation: vi.fn(),
     };
diff --git a/frontend/src/components/QueryEditor.tsx b/frontend/src/components/QueryEditor.tsx
index f8e06d6..e04a850 100644
--- a/frontend/src/components/QueryEditor.tsx
+++ b/frontend/src/components/QueryEditor.tsx
@@ -1766,6 +1766,16 @@ const resolveEventTargetNode = (target: EventTarget | null): Node | null => (
     typeof Node !== 'undefined' && target instanceof Node ? target : null
 );
 
+const isDocumentLevelShortcutTarget = (targetNode: Node | null): boolean => {
+    if (!targetNode) {
+        return true;
+    }
+    if (typeof document === 'undefined') {
+        return false;
+    }
+    return targetNode === document.body || targetNode === document.documentElement;
+};
+
 const clearQueryEditorLinkDecorations = (
     editor: any,
     decorationIdsRef: React.MutableRefObject<string[]>,
@@ -5004,7 +5014,7 @@ const QueryEditor: React.FC<{ tab: TabData; isActive?: boolean }> = ({ tab, isAc
           const targetNode = resolveEventTargetNode(event.target);
           const editorHasFocus = !!editor?.hasTextFocus?.();
           const inQueryEditor = !!(targetNode && queryEditorRootRef.current?.contains(targetNode));
-          if (!editorHasFocus && !inQueryEditor) {
+          if (!editorHasFocus && !inQueryEditor && !isDocumentLevelShortcutTarget(targetNode)) {
               return;
           }
 
diff --git a/frontend/src/utils/columnDefinition.test.ts b/frontend/src/utils/columnDefinition.test.ts
index e8d00fb..43fea31 100644
--- a/frontend/src/utils/columnDefinition.test.ts
+++ b/frontend/src/utils/columnDefinition.test.ts
@@ -60,6 +60,21 @@ describe('columnDefinition metadata normalization', () => {
     });
   });
 
+  it('normalizes Dameng style data length and nullable flags', () => {
+    const column = {
+      COLUMN_NAME: 'USER_NAME',
+      DATA_TYPE: 'VARCHAR2',
+      DATA_LENGTH: 64,
+      NULLABLE: 'N',
+    };
+
+    expect(normalizeColumnDefinition(column)).toMatchObject({
+      name: 'USER_NAME',
+      type: 'VARCHAR2(64)',
+      nullable: 'NO',
+    });
+  });
+
   it('maps boolean primary and unique metadata aliases to GoNavi keys', () => {
     expect(getColumnDefinitionKey({ column_name: 'id', isPrimary: true })).toBe('PRI');
     expect(getColumnDefinitionKey({ column_name: 'id', primary_key: 't' })).toBe('PRI');
diff --git a/frontend/src/utils/columnDefinition.ts b/frontend/src/utils/columnDefinition.ts
index 22d9c12..b67e381 100644
--- a/frontend/src/utils/columnDefinition.ts
+++ b/frontend/src/utils/columnDefinition.ts
@@ -55,6 +55,19 @@ const readNumberProperty = (value: unknown, keys: string[]): number => {
   return Number.isFinite(parsed) && parsed > 0 ? Math.trunc(parsed) : 0;
 };
 
+const normalizeNullable = (value: string): string => {
+  const normalized = String(value || '').trim();
+  if (!normalized) return '';
+  const upper = normalized.toUpperCase();
+  if (upper === 'N' || upper === 'NO' || upper === 'FALSE' || upper === '0' || upper === 'NOT NULL') {
+    return 'NO';
+  }
+  if (upper === 'Y' || upper === 'YES' || upper === 'TRUE' || upper === '1' || upper === 'NULL' || upper === 'NULLABLE') {
+    return 'YES';
+  }
+  return normalized;
+};
+
 export const getColumnDefinitionName = (column: unknown): string => (
   readStringProperty(column, ['name', 'Name', 'COLUMN_NAME', 'column_name', 'field', 'Field'])
 );
@@ -85,6 +98,8 @@ export const getColumnDefinitionType = (column: unknown): string => {
     'character_max_length',
     'CHAR_LENGTH',
     'char_length',
+    'DATA_LENGTH',
+    'data_length',
     'LENGTH',
     'length',
   ]);
@@ -148,7 +163,7 @@ export const normalizeColumnDefinition = (column: unknown): ColumnDefinition =>
     ...source,
     name: getColumnDefinitionName(column),
     type: getColumnDefinitionType(column),
-    nullable: readStringProperty(column, ['nullable', 'Nullable', 'NULLABLE', 'is_nullable', 'IS_NULLABLE', 'Null', 'null']),
+    nullable: normalizeNullable(readStringProperty(column, ['nullable', 'Nullable', 'NULLABLE', 'is_nullable', 'IS_NULLABLE', 'Null', 'null'])),
     key: getColumnDefinitionKey(column),
     default: source.default,
     extra: getColumnDefinitionExtra(column),
diff --git a/internal/db/dameng_columns_test.go b/internal/db/dameng_columns_test.go
index e1ad3c6..104ac6b 100644
--- a/internal/db/dameng_columns_test.go
+++ b/internal/db/dameng_columns_test.go
@@ -15,6 +15,11 @@ func TestBuildDamengColumnsQuery_IncludesPrimaryKeyMetadata(t *testing.T) {
 	if !strings.Contains(ownerQuery, "AS column_key") {
 		t.Fatalf("owner query 应返回 column_key, got=%s", ownerQuery)
 	}
+	for _, want := range []string{"c.data_length", "c.char_length", "c.data_precision", "c.data_scale"} {
+		if !strings.Contains(ownerQuery, want) {
+			t.Fatalf("owner query 应返回字段类型长度信息 %q, got=%s", want, ownerQuery)
+		}
+	}
 	if !strings.Contains(ownerQuery, "WHERE c.owner = 'BIZ' AND c.table_name = 'ORDERS'") {
 		t.Fatalf("owner query 应按 owner/table 过滤, got=%s", ownerQuery)
 	}
@@ -42,22 +47,36 @@ func TestBuildDamengColumnDefinitions_MarksPrimaryKeyColumns(t *testing.T) {
 		{
 			"COLUMN_NAME":  "NAME",
 			"DATA_TYPE":    "VARCHAR2",
+			"DATA_LENGTH":  128,
+			"CHAR_LENGTH":  64,
 			"NULLABLE":     "Y",
 			"DATA_DEFAULT": "guest",
 			"COLUMN_KEY":   "",
 		},
+		{
+			"COLUMN_NAME":    "AMOUNT",
+			"DATA_TYPE":      "NUMBER",
+			"DATA_PRECISION": 10,
+			"DATA_SCALE":     2,
+			"NULLABLE":       "N",
+			"DATA_DEFAULT":   nil,
+			"COLUMN_KEY":     "",
+		},
 	})
 
-	if len(columns) != 2 {
+	if len(columns) != 3 {
 		t.Fatalf("unexpected column count: %d", len(columns))
 	}
-	if columns[0].Name != "ID" || columns[0].Key != "PRI" {
+	if columns[0].Name != "ID" || columns[0].Key != "PRI" || columns[0].Nullable != "NO" {
 		t.Fatalf("主键列未正确标记: %+v", columns[0])
 	}
-	if columns[1].Name != "NAME" || columns[1].Key != "" {
+	if columns[1].Name != "NAME" || columns[1].Type != "VARCHAR2(64)" || columns[1].Nullable != "YES" || columns[1].Key != "" {
 		t.Fatalf("非主键列标记异常: %+v", columns[1])
 	}
 	if columns[1].Default == nil || *columns[1].Default != "guest" {
 		t.Fatalf("默认值未保留: %+v", columns[1])
 	}
+	if columns[2].Name != "AMOUNT" || columns[2].Type != "NUMBER(10,2)" || columns[2].Nullable != "NO" {
+		t.Fatalf("数值字段定义异常: %+v", columns[2])
+	}
 }
diff --git a/internal/db/dameng_metadata.go b/internal/db/dameng_metadata.go
index 2492a85..f06ab45 100644
--- a/internal/db/dameng_metadata.go
+++ b/internal/db/dameng_metadata.go
@@ -110,7 +110,7 @@ func buildDamengColumnsQuery(dbName, tableName string) string {
 	upperDBName := strings.ToUpper(strings.TrimSpace(dbName))
 
 	if upperDBName == "" {
-		return fmt.Sprintf(`SELECT c.column_name, c.data_type, c.nullable, c.data_default,
+		return fmt.Sprintf(`SELECT c.column_name, c.data_type, c.data_length, c.char_length, c.data_precision, c.data_scale, c.nullable, c.data_default,
 		CASE WHEN pk.column_name IS NOT NULL THEN 'PRI' ELSE '' END AS column_key
 		FROM user_tab_columns c
 		LEFT JOIN (
@@ -123,7 +123,7 @@ func buildDamengColumnsQuery(dbName, tableName string) string {
 		ORDER BY c.column_id`, upperTableName)
 	}
 
-	return fmt.Sprintf(`SELECT c.column_name, c.data_type, c.nullable, c.data_default,
+	return fmt.Sprintf(`SELECT c.column_name, c.data_type, c.data_length, c.char_length, c.data_precision, c.data_scale, c.nullable, c.data_default,
 		CASE WHEN pk.column_name IS NOT NULL THEN 'PRI' ELSE '' END AS column_key
 		FROM all_tab_columns c
 		LEFT JOIN (
@@ -137,13 +137,77 @@ func buildDamengColumnsQuery(dbName, tableName string) string {
 		ORDER BY c.column_id`, upperDBName, upperTableName)
 }
 
+func getDamengRowInt(row map[string]interface{}, keys ...string) (int, bool) {
+	for _, key := range keys {
+		raw := getDamengRowString(row, key)
+		if raw == "" {
+			continue
+		}
+		var parsed int
+		if _, err := fmt.Sscanf(raw, "%d", &parsed); err == nil {
+			return parsed, true
+		}
+	}
+	return 0, false
+}
+
+func normalizeDamengNullable(value string) string {
+	switch strings.ToUpper(strings.TrimSpace(value)) {
+	case "N", "NO", "FALSE", "0", "NOT NULL":
+		return "NO"
+	case "Y", "YES", "TRUE", "1", "NULL", "NULLABLE":
+		return "YES"
+	default:
+		return strings.TrimSpace(value)
+	}
+}
+
+func isDamengLengthQualifiedType(upperType string) bool {
+	switch strings.TrimSpace(upperType) {
+	case "CHAR", "NCHAR", "VARCHAR", "VARCHAR2", "NVARCHAR", "NVARCHAR2", "RAW", "BINARY", "VARBINARY":
+		return true
+	default:
+		return strings.Contains(upperType, "CHARACTER")
+	}
+}
+
+func formatDamengColumnType(row map[string]interface{}) string {
+	dataType := getDamengRowString(row, "DATA_TYPE")
+	if dataType == "" || strings.Contains(dataType, "(") {
+		return dataType
+	}
+
+	upperType := strings.ToUpper(dataType)
+	if isDamengLengthQualifiedType(upperType) {
+		if charLength, ok := getDamengRowInt(row, "CHAR_LENGTH", "CHAR_COL_DECL_LENGTH"); ok && charLength > 0 {
+			return fmt.Sprintf("%s(%d)", dataType, charLength)
+		}
+		if dataLength, ok := getDamengRowInt(row, "DATA_LENGTH"); ok && dataLength > 0 {
+			return fmt.Sprintf("%s(%d)", dataType, dataLength)
+		}
+	}
+
+	if strings.Contains(upperType, "NUMBER") || strings.Contains(upperType, "DECIMAL") || strings.Contains(upperType, "NUMERIC") {
+		precision, hasPrecision := getDamengRowInt(row, "DATA_PRECISION", "NUMERIC_PRECISION")
+		if hasPrecision && precision > 0 {
+			scale, hasScale := getDamengRowInt(row, "DATA_SCALE", "NUMERIC_SCALE")
+			if hasScale && scale > 0 {
+				return fmt.Sprintf("%s(%d,%d)", dataType, precision, scale)
+			}
+			return fmt.Sprintf("%s(%d)", dataType, precision)
+		}
+	}
+
+	return dataType
+}
+
 func buildDamengColumnDefinitions(data []map[string]interface{}) []connection.ColumnDefinition {
 	columns := make([]connection.ColumnDefinition, 0, len(data))
 	for _, row := range data {
 		col := connection.ColumnDefinition{
 			Name:     getDamengRowString(row, "COLUMN_NAME"),
-			Type:     getDamengRowString(row, "DATA_TYPE"),
-			Nullable: getDamengRowString(row, "NULLABLE"),
+			Type:     formatDamengColumnType(row),
+			Nullable: normalizeDamengNullable(getDamengRowString(row, "NULLABLE")),
 			Key:      getDamengRowString(row, "COLUMN_KEY"),
 		}
 
diff --git a/internal/db/oracle_get_tables_test.go b/internal/db/oracle_get_tables_test.go
index 97608a4..093be14 100644
--- a/internal/db/oracle_get_tables_test.go
+++ b/internal/db/oracle_get_tables_test.go
@@ -104,13 +104,59 @@ func TestOracleGetColumnsIncludesColumnComments(t *testing.T) {
 	if len(queries) == 0 || !strings.Contains(queries[0], "all_col_comments") {
 		t.Fatalf("expected GetColumns to join all_col_comments, queries=%v", queries)
 	}
-	for _, want := range []string{`AS "COLUMN_NAME"`, `AS "DATA_TYPE"`, `AS "COMMENT"`} {
+	for _, want := range []string{`AS "COLUMN_NAME"`, `AS "DATA_TYPE"`, `AS "DATA_LENGTH"`, `AS "CHAR_LENGTH"`, `AS "DATA_PRECISION"`, `AS "DATA_SCALE"`, `AS "COMMENT"`} {
 		if !strings.Contains(queries[0], want) {
 			t.Fatalf("expected GetColumns query to contain stable alias %q, got %s", want, queries[0])
 		}
 	}
 }
 
+func TestFormatOracleColumnTypeIncludesLengthAndPrecision(t *testing.T) {
+	t.Parallel()
+
+	cases := []struct {
+		name string
+		row  map[string]interface{}
+		want string
+	}{
+		{
+			name: "varchar2 char length",
+			row: map[string]interface{}{
+				"DATA_TYPE":   "VARCHAR2",
+				"DATA_LENGTH": 256,
+				"CHAR_LENGTH": 128,
+			},
+			want: "VARCHAR2(128)",
+		},
+		{
+			name: "number precision scale",
+			row: map[string]interface{}{
+				"DATA_TYPE":      "NUMBER",
+				"DATA_PRECISION": 10,
+				"DATA_SCALE":     2,
+			},
+			want: "NUMBER(10,2)",
+		},
+		{
+			name: "date remains plain",
+			row: map[string]interface{}{
+				"DATA_TYPE": "DATE",
+			},
+			want: "DATE",
+		},
+	}
+
+	for _, tc := range cases {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			if got := formatOracleColumnType(tc.row); got != tc.want {
+				t.Fatalf("expected %q, got %q", tc.want, got)
+			}
+		})
+	}
+}
+
 func TestOracleGetCreateStatementAppendsTableAndColumnComments(t *testing.T) {
 	t.Parallel()
 
diff --git a/internal/db/oracle_impl.go b/internal/db/oracle_impl.go
index d5ad107..00a8dbf 100644
--- a/internal/db/oracle_impl.go
+++ b/internal/db/oracle_impl.go
@@ -325,7 +325,7 @@ func (o *OracleDB) GetCreateStatement(dbName, tableName string) (string, error)
 func (o *OracleDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefinition, error) {
 	metadataTableName := escapeOracleMetadataLiteral(tableName)
 	metadataSchemaName := escapeOracleMetadataLiteral(dbName)
-	query := fmt.Sprintf(`SELECT c.column_name AS "COLUMN_NAME", c.data_type AS "DATA_TYPE", c.nullable AS "NULLABLE", c.data_default AS "DATA_DEFAULT",
+	query := fmt.Sprintf(`SELECT c.column_name AS "COLUMN_NAME", c.data_type AS "DATA_TYPE", c.data_length AS "DATA_LENGTH", c.char_length AS "CHAR_LENGTH", c.data_precision AS "DATA_PRECISION", c.data_scale AS "DATA_SCALE", c.nullable AS "NULLABLE", c.data_default AS "DATA_DEFAULT",
 		CASE WHEN pk.column_name IS NOT NULL THEN 'PRI' ELSE '' END AS "COLUMN_KEY",
 		cc.comments AS "COMMENT"
 		FROM all_tab_columns c
@@ -342,7 +342,7 @@ func (o *OracleDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefi
 		ORDER BY c.column_id`, metadataSchemaName, metadataTableName)
 
 	if dbName == "" {
-		query = fmt.Sprintf(`SELECT c.column_name AS "COLUMN_NAME", c.data_type AS "DATA_TYPE", c.nullable AS "NULLABLE", c.data_default AS "DATA_DEFAULT",
+		query = fmt.Sprintf(`SELECT c.column_name AS "COLUMN_NAME", c.data_type AS "DATA_TYPE", c.data_length AS "DATA_LENGTH", c.char_length AS "CHAR_LENGTH", c.data_precision AS "DATA_PRECISION", c.data_scale AS "DATA_SCALE", c.nullable AS "NULLABLE", c.data_default AS "DATA_DEFAULT",
 			CASE WHEN pk.column_name IS NOT NULL THEN 'PRI' ELSE '' END AS "COLUMN_KEY",
 			cc.comments AS "COMMENT"
 			FROM user_tab_columns c
@@ -367,7 +367,7 @@ func (o *OracleDB) GetColumns(dbName, tableName string) ([]connection.ColumnDefi
 	for _, row := range data {
 		col := connection.ColumnDefinition{
 			Name:     oracleRowString(row, "COLUMN_NAME"),
-			Type:     oracleRowString(row, "DATA_TYPE"),
+			Type:     formatOracleColumnType(row),
 			Nullable: oracleRowString(row, "NULLABLE"),
 			Key:      oracleRowString(row, "COLUMN_KEY"),
 			Comment:  oracleRowString(row, "COMMENT"),
@@ -402,7 +402,58 @@ func oracleRowString(row map[string]interface{}, names ...string) string {
 	if value == nil {
 		return ""
 	}
-	return fmt.Sprintf("%v", value)
+	return strings.TrimSpace(fmt.Sprintf("%v", value))
+}
+
+func oracleRowInt(row map[string]interface{}, names ...string) (int, bool) {
+	raw := oracleRowString(row, names...)
+	if raw == "" {
+		return 0, false
+	}
+	parsed, err := strconv.Atoi(raw)
+	if err != nil {
+		return 0, false
+	}
+	return parsed, true
+}
+
+func isOracleLengthQualifiedType(upperType string) bool {
+	switch strings.TrimSpace(upperType) {
+	case "CHAR", "NCHAR", "VARCHAR", "VARCHAR2", "NVARCHAR", "NVARCHAR2", "RAW", "BINARY", "VARBINARY":
+		return true
+	default:
+		return strings.Contains(upperType, "CHARACTER")
+	}
+}
+
+func formatOracleColumnType(row map[string]interface{}) string {
+	dataType := oracleRowString(row, "DATA_TYPE")
+	if dataType == "" || strings.Contains(dataType, "(") {
+		return dataType
+	}
+
+	upperType := strings.ToUpper(dataType)
+	if isOracleLengthQualifiedType(upperType) {
+		if charLength, ok := oracleRowInt(row, "CHAR_LENGTH", "CHAR_COL_DECL_LENGTH"); ok && charLength > 0 {
+			return fmt.Sprintf("%s(%d)", dataType, charLength)
+		}
+		if dataLength, ok := oracleRowInt(row, "DATA_LENGTH"); ok && dataLength > 0 {
+			return fmt.Sprintf("%s(%d)", dataType, dataLength)
+		}
+	}
+
+	if strings.Contains(upperType, "NUMBER") || strings.Contains(upperType, "DECIMAL") || strings.Contains(upperType, "NUMERIC") {
+		precision, hasPrecision := oracleRowInt(row, "DATA_PRECISION", "NUMERIC_PRECISION")
+		if hasPrecision && precision > 0 {
+			scale, hasScale := oracleRowInt(row, "DATA_SCALE", "NUMERIC_SCALE")
+			if hasScale && scale > 0 {
+				return fmt.Sprintf("%s(%d,%d)", dataType, precision, scale)
+			}
+			return fmt.Sprintf("%s(%d)", dataType, precision)
+		}
+	}
+
+	return dataType
 }
 
 func (o *OracleDB) appendOracleCommentDDL(baseDDL string, dbName string, tableName string) string {